I love to read books in a series, especially mysteries. I am a real stickler for reading them in chronological order, so Fictfact has been a really useful tool for me. Here's a sampling of the many series I'm wading through, as viewed on Fictfact:
Another good source for mysteries is the site Stop, You're Killing Me. This site has many great features, include links to lists of the latest mystery award winners & a great selection of indexes-location, job, historical, diversity, genre. I tend to like mysteries from the British Isles & Police Procedurals. One of my co-workers is a Cozy Mystery fan, with an emphasis on Food & Drink or Crafts & Needlework. What's your poison, so to speak?
If you are a mystery reader, three of the ABC Libraries' branches have book groups that focus on mysteries-Main has The Wide World of Mystery book group, Tony Hillerman has the Who Dunnit? Mystery Book Club & there's also the Mystery Book Group at Cherry Hills Library.